Lao Bao Prison was built by the French colonialists in 1908 on an area of about 10 hectares in Lao Bao town, Huong Hoa district, Quang Tri province. Initially, it was used to detain common criminals and patriotic scholars participating in anti-French movements. By the 1928–1929 period, the prison was expanded with two ranges, Lao A and Lao B, constructed of wood with tile roofs. Each range was approximately 15 m long, 5 m wide, and 2 m high, capable of holding about 60 prisoners. Later, the scale of the prison continued to expand with building ranges 30 m long and 6 m wide, each compartment holding up to 180 prisoners, along with a solitary confinement area consisting of 13 cells for prisoners considered dangerous. During its period of operation, it detained many famous revolutionaries and patriotic figures, notably General Nguyen Chi Thanh and poet To Huu.
During Vietnam's resistance wars against the French and the Americans, Lao Bao Prison was partially destroyed by bombs and bullets. Nevertheless, to this day, the relic still preserves many artifacts and historical traces, helping reconstruct the harsh years under colonial rule. Located about 2 km from National Highway 9 and approximately 80 km from Dong Ha city, it has now become a historical sightseeing destination that educates visitors on patriotic traditions and the unyielding spirit of the nation. Restoration and conservation work are still underway; however, some items have deteriorated, so visitors are asked to preserve and respect the historical space when visiting.
